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Using a rotary device for treating molten metal

  • US 4,673,434 A
  • Filed: 08/04/1986
  • Issued: 06/16/1987
  • Est. Priority Date: 11/12/1985
  • Status: Expired due to Fees
First Claim
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1. A method for the treatment of molten metal utilizing a rotary device comprising a hollow shaft and a hollow rotor affixedly attached to the shaft, the rotor comprising top, bottom and peripheral surfaces and a hollow interior and said rotor having a plurality of vanes each extending from the shaft towards the peripheral surface of the rotor so that the hollow interior of the rotor is divided into a plurality of compartments, with at least one aperture in at least one of the top and bottom surfaces of the rotor adjacent the shaft and at least one aperture in the peripheral surface of the rotor, and at least one duct for the passage of gas from the hollow interior of the shaft to each of the compartments, the method comprising the steps of:

  • dispersing a gas in molten metal contained in a vessel by rotating the shaft so that the molten metal enters each of the compartments through the at least one aperture in the at least one of the top and bottom surfaces, and flows outwardly through the at least one aperture in the peripheral surface, supplying gas to the at least one duct, and passing the gas from the hollow interior of the shaft to each of the compartments to be dispersed in molten metal within the compartments.

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